mkgeo_ugrid: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/mkgeo_ugrid - from package: rheolef

You may install the required package with command apt-get install {package}

Error in other languages:
mkgeo_ugrid: bevel nie gevind nie
mkgeo_ugrid: comandă negăsită
mkgeo_ugrid: comando não encontrado
mkgeo_ugrid: commande introuvable
mkgeo_ugrid: command not found
mkgeo_ugrid: käsku ei ole
mkgeo_ugrid: không tìm thấy lệnh
mkgeo_ugrid: komanda nerasta
mkgeo_ugrid: Kommando nicht gefunden.
mkgeo_ugrid: kommandot finns inte
mkgeo_ugrid: komut yok
mkgeo_ugrid: nie znaleziono polecenia
mkgeo_ugrid: níor aimsíodh an t-ordú
mkgeo_ugrid: no se encontró la orden
mkgeo_ugrid: no s'ha trobat l'ordre
mkgeo_ugrid: opdracht niet gevonden
mkgeo_ugrid: parancs nem található
mkgeo_ugrid: perintah tidak ditemukan
mkgeo_ugrid: príkaz nenájdený
mkgeo_ugrid: příkaz nenalezen
mkgeo_ugrid: команда не найдена
mkgeo_ugrid: командата не е открита
mkgeo_ugrid: 命令找不到
mkgeo_ugrid: コマンドが見つかりません